import { URL, Toast, ajax } from '../../utils/index'

import WxCanvas from '../../ec-canvas/wx-canvas';
import * as echarts from '../../ec-canvas/echarts';
var ctx;

function compareVersion(v1, v2) {
  v1 = v1.split('.')
  v2 = v2.split('.')
  const len = Math.max(v1.length, v2.length)

  while (v1.length < len) {
    v1.push('0')
  }
  while (v2.length < len) {
    v2.push('0')
  }

  for (let i = 0; i < len; i++) {
    const num1 = parseInt(v1[i])
    const num2 = parseInt(v2[i])

    if (num1 > num2) {
      return 1
    } else if (num1 < num2) {
      return -1
    }
  }
  return 0
}
function wrapTouch(event) {
  for (let i = 0; i < event.touches.length; ++i) {
    const touch = event.touches[i];
    touch.offsetX = touch.x;
    touch.offsetY = touch.y;
  }
  return event;
}

Component({
  properties: {
    entity: {
      type: Object,
      value: null
    },
    canvasId: {
      type: String,
      value: 'ec-radarCanvas'
    },
    ec: {
      type: Object,
      value: {
        lazyLoad: true
      }
    },
    forceUseOldCanvas: {
      type: Boolean,
      value: false
    }
  },
  data: {
    isUseNewCanvas: false,
    img: null
  },
  /**
   * 函数
   */
  methods: {
    cancelClick() {
      this.triggerEvent("cancel")
    },
    setOption(chart) {
      const option = {
        tooltip: {
          trigger: 'axis'
        },
        // graphic: {
        //   type: "image",
        //   left: "center",
        //   top: "45.7%",
        //   style: {
        //     image: this._img,
        //     width: 70
        //   },
        //   zlevel: 200
        // },
        radar: {
          splitNumber: 4,
          shape: 'circle',
          name: {
            textStyle: {
              color: '#666666'
            }
          },
          indicator: this.data.entity.list
        },
        series: [{
          type: 'radar',
          color: ['#026FFF'],
          tooltip: {
            trigger: 'item',
            show: true,
            formatter: (params) => {
              var s = params.name + '\n';
              let {entity} = this.data
              entity.list.forEach((item, index) => {
                let n = index + 1 == entity.list.length ? '' : '\n'
                s += item.name + ': ' + params.value[index] + n
              })
              return s;
            },
          },
          areaStyle: {},
          data: [
            {
              value: this.data.entity.data,
              areaStyle: { color: 'rgba(2,111,255,0.15)' },
              name: '能力分析',
              symbol: '',
              symbolSize: 6,
            }
          ]
        }]
      };
      chart.setOption(option);
    },
    init: function (callback) {
      const version = wx.getSystemInfoSync().SDKVersion
      const canUseNewCanvas = compareVersion(version, '2.9.0') >= 0;
      const forceUseOldCanvas = this.data.forceUseOldCanvas;
      const isUseNewCanvas = canUseNewCanvas && !forceUseOldCanvas;
      this.setData({ isUseNewCanvas });
      if (forceUseOldCanvas && canUseNewCanvas) {
        console.warn('开发者强制使用旧canvas,建议关闭');
      }
      if (isUseNewCanvas) {
        // console.log('微信基础库版本大于2.9.0，开始使用<canvas type="2d"/>');
        // 2.9.0 可以使用 <canvas type="2d"></canvas>
        this.initByNewWay(callback);
      } else {
        const isValid = compareVersion(version, '1.9.91') >= 0
        if (!isValid) {
          console.error('微信基础库版本过低，需大于等于 1.9.91。'
            + '参见：https://github.com/ecomfe/echarts-for-weixin'
            + '#%E5%BE%AE%E4%BF%A1%E7%89%88%E6%9C%AC%E8%A6%81%E6%B1%82');
          return;
        } else {
          console.warn('建议将微信基础库调整大于等于2.9.0版本。升级后绘图将有更好性能');
          this.initByOldWay(callback);
        }
      }

    },

    initByOldWay(callback) {
      // 1.9.91 <= version < 2.9.0：原来的方式初始化
      ctx = wx.createCanvasContext(this.data.canvasId, this);
      const canvas = new WxCanvas(ctx, this.data.canvasId, false);
      echarts.setCanvasCreator(() => {
        return canvas;
      });
      // const canvasDpr = wx.getSystemInfoSync().pixelRatio // 微信旧的canvas不能传入dpr
      const canvasDpr = 1
      var query = wx.createSelectorQuery().in(this);
      query.select('.ec-canvas').boundingClientRect(res => {
        if (typeof callback === 'function') {
          this.chart = callback(canvas, res.width, res.height, canvasDpr);
        }
        else if (this.data.ec && typeof this.data.ec.onInit === 'function') {
          this.chart = this.data.ec.onInit(canvas, res.width, res.height, canvasDpr);
        }
        else {
          this.triggerEvent('init', {
            canvas: canvas,
            width: res.width,
            height: res.height,
            canvasDpr: canvasDpr // 增加了dpr，可方便外面echarts.init
          });
        }

      }).exec();
    },

    initByNewWay(callback) {
      // version >= 2.9.0：使用新的方式初始化
      const query = wx.createSelectorQuery().in(this)
      query
        .select('.ec-canvas')
        .fields({ node: true, size: true })
        .exec(res => {
          const canvasNode = res[0].node
          this.canvasNode = canvasNode
          const canvasDpr = wx.getSystemInfoSync().pixelRatio
          const canvasWidth = res[0].width
          const canvasHeight = res[0].height
          const ctx = canvasNode.getContext('2d')
          const canvas = new WxCanvas(ctx, this.data.canvasId, true, canvasNode)
          const img = canvasNode.createImage();
          img.onload = () => {
            this._img = img
          }
          img.src = 'http://qiniu.zl-ai.com/FhTN_xScEsDq1__-fdGT-oix2EHY'
          echarts.setCanvasCreator(() => {
            return canvas
          })
          if (typeof callback === 'function') {
            this.chart = callback(canvas, canvasWidth, canvasHeight, canvasDpr)
          } else if (this.data.ec && typeof this.data.ec.onInit === 'function') {
            this.chart = this.data.ec.onInit(canvas, canvasWidth, canvasHeight, canvasDpr)
          } else {
            this.triggerEvent('init', {
              canvas: canvas,
              width: canvasWidth,
              height: canvasHeight,
              dpr: canvasDpr
            })
          }
        })
    },
    canvasToTempFilePath(opt) {
      if (this.data.isUseNewCanvas) {
        // 新版
        const query = wx.createSelectorQuery().in(this)
        query
          .select('.ec-canvas')
          .fields({ node: true, size: true })
          .exec(res => {
            const canvasNode = res[0].node
            opt.canvas = canvasNode
            wx.canvasToTempFilePath(opt)
          })
      } else {
        // 旧的  
        if (!opt.canvasId) {
          opt.canvasId = this.data.canvasId;
        }
        ctx.draw(true, () => {
          wx.canvasToTempFilePath(opt, this);
        });
      }
    },

    touchStart(e) {
      if (this.chart && e.touches.length > 0) {
        var touch = e.touches[0];
        var handler = this.chart.getZr().handler;
        handler.dispatch('mousedown', {
          zrX: touch.x,
          zrY: touch.y
        });
        handler.dispatch('mousemove', {
          zrX: touch.x,
          zrY: touch.y
        });
        handler.processGesture(wrapTouch(e), 'start');
      }
    },

    touchMove(e) {
      if (this.chart && e.touches.length > 0) {
        var touch = e.touches[0];
        var handler = this.chart.getZr().handler;
        handler.dispatch('mousemove', {
          zrX: touch.x,
          zrY: touch.y
        });
        handler.processGesture(wrapTouch(e), 'change');
      }
    },

    touchEnd(e) {
      if (this.chart) {
        const touch = e.changedTouches ? e.changedTouches[0] : {};
        var handler = this.chart.getZr().handler;
        handler.dispatch('mouseup', {
          zrX: touch.x,
          zrY: touch.y
        });
        handler.dispatch('click', {
          zrX: touch.x,
          zrY: touch.y
        });
        handler.processGesture(wrapTouch(e), 'end');
      }
    }
  },
  // 属性监听
  observers: {
    entity(value) {
      console.log('canvas=======================', this.data.entity)
      if (!value) return
      this.init((canvas, width, height, dpr) => {
        const chart = echarts.init(canvas, null, {
          width: width,
          height: height,
          devicePixelRatio: dpr
        });
        this.setOption(chart);
        this.chart = chart;
        return chart;
      });
    },
  },
  // 组件生命周期函数，在组件实例进入页面节点树时执行，注意此时不能调用setData
  created: function () { },
  // 组件生命周期函数，在组件实例进入页面节点树时执行。
  attached: function () { },
  // 在组件布局完成后执行，此时可以获取节点信息
  ready: function () {
    if (!this.data.ec) {
      console.warn('组件需绑定 ec 变量，例：<ec-canvas id="mychart-dom-bar" '
        + 'canvas-id="mychart-bar" ec="{{ ec }}"></ec-canvas>');
      return;
    }
    if (!this.data.ec.lazyLoad) {
      this.init();
    }
  },
  // 在组件实例被移动到节点树另一个位置时执行
  moved: function () { },
  // 在组件实例被从页面节点树移除时执行
  detached: function () { }
});